Title :
Cognitive AF Relay assisting both primary and secondary transmission with beamforming
Author :
Thi My Chinh Chu ; Hoc Phan ; Zepernick, Hans-Jurgen
Author_Institution :
Blekinge Inst. of Technol., Karlskrona, Sweden
fDate :
July 30 2014-Aug. 1 2014
Abstract :
This paper investigates the system performance of a cognitive relay network with underlay spectrum sharing wherein the relay is exploited to assist both the primary and secondary transmitters in forwarding their signals to the respective destinations. To exploit spatial diversity, beamforming transmission is implemented at the transceivers of the primary and secondary networks. Particularly, exact expressions for the outage probability and symbol error rate (SER) of the primary transmission and tight bounded expressions for the outage probability and SER of the secondary transmission are derived. Furthermore, an asymptotic analysis for the primary network, which is utilized to investigate the diversity and coding gain of the network, is developed. Finally, numerical results are presented to show the benefits of the proposed system.
Keywords :
amplify and forward communication; array signal processing; cognitive radio; radio spectrum management; radio transceivers; relay networks (telecommunication); asymptotic analysis; beamforming transmission; cognitive AF relay; outage probability; primary network; primary transmission; primary transmitters; secondary transmission; secondary transmitters; spatial diversity; spectrum sharing; symbol error rate; Receiving antennas; Transmitting antennas;
Conference_Titel :
Communications and Electronics (ICCE), 2014 IEEE Fifth International Conference on
Conference_Location :
Danang
Print_ISBN :
978-1-4799-5049-2
DOI :
10.1109/CCE.2014.6916692